return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C5H10 (Cyclopentane)

using model chemistry: BLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at BLYP/6-31G*
 hartrees
Energy at 0K-196.418179
Energy at 298.15K 
HF Energy-196.418179
Nuclear repulsion energy185.492129
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at BLYP/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3028 3004 121.88      
2 A 3013 2989 21.40      
3 A 3011 2987 34.54      
4 A 3008 2984 17.11      
5 A 2998 2974 42.69      
6 A 2982 2958 58.94      
7 A 2967 2943 28.01      
8 A 2965 2941 24.91      
9 A 2957 2933 39.56      
10 A 2951 2927 19.98      
11 A 1514 1501 0.01      
12 A 1489 1477 1.80      
13 A 1488 1476 0.48      
14 A 1484 1472 1.81      
15 A 1479 1467 0.06      
16 A 1327 1316 2.02      
17 A 1327 1316 2.04      
18 A 1319 1309 0.02      
19 A 1300 1290 0.32      
20 A 1282 1272 0.00      
21 A 1259 1249 0.70      
22 A 1216 1206 0.29      
23 A 1200 1190 0.57      
24 A 1183 1174 0.22      
25 A 1149 1139 0.01      
26 A 1019 1010 0.01      
27 A 1011 1003 0.00      
28 A 984 976 0.35      
29 A 954 946 0.78      
30 A 882 875 1.17      
31 A 874 867 1.24      
32 A 856 849 0.38      
33 A 847 840 0.47      
34 A 803 797 0.14      
35 A 755 749 0.84      
36 A 603 598 0.17      
37 A 540 536 1.28      
38 A 260 257 0.00      
39 A 5i 4i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 30139.5 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 29895.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at BLYP/6-31G*
ABC
0.21216 0.21199 0.12223

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.013 -0.767 0.255
C2 -0.338 1.259 0.126
C3 -1.319 0.037 0.015
C4 -0.412 -1.231 -0.154
C5 1.065 0.699 -0.242
H6 -0.324 1.639 1.163
H7 -0.637 2.104 -0.515
H8 -2.009 0.146 -0.838
H9 -1.949 -0.041 0.916
H10 -0.402 -1.550 -1.211
H11 -0.768 -2.091 0.435
H12 1.811 -1.402 -0.165
H13 1.121 -0.792 1.355
H14 1.206 0.713 -1.338
H15 1.891 1.283 0.199

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15
C12.43912.47841.55321.54922.89853.40043.34063.12042.18322.22711.10291.10582.18322.2311
C22.43911.57092.50681.55541.10381.10222.22702.21523.11223.39243.43322.80142.19732.2303
C32.47841.57091.56802.48772.20752.24001.10231.10252.20502.23853.44962.90462.94303.4478
C41.55322.50681.56802.43193.15863.36192.21662.21901.10421.10242.22962.19542.79223.4272
C51.54921.55542.48772.43192.18772.22453.17983.31252.85553.40722.23082.18581.10561.1029
H62.89851.10382.20753.15862.18771.76923.01152.34973.97633.82673.94572.83463.07462.4415
H73.40041.10222.24003.36192.22451.76922.41212.89283.72744.30394.29073.87032.45182.7524
H83.34062.22701.10232.21663.17983.01152.41211.76512.36572.85764.17623.93513.30234.1920
H93.12042.21521.10252.21903.31252.34972.89281.76513.03242.41484.14243.19053.94994.1241
H102.18323.11222.20501.10422.85553.97633.72742.36573.03241.77102.45283.07922.77923.9082
H112.22713.39242.23851.10243.40723.82674.30392.85762.41481.77102.73682.47083.86094.3030
H121.10293.43323.44962.22962.23083.94574.29074.17624.14242.45282.73681.77782.49282.7107
H131.10582.80142.90462.19542.18582.83463.87033.93513.19053.07922.47081.77783.08672.4975
H142.18322.19732.94302.79221.10563.07462.45183.30233.94992.77923.86092.49283.08671.7767
H152.23112.23033.44783.42721.10292.44152.75244.19204.12413.90824.30302.71072.49751.7767

picture of Cyclopentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 C3 105.130 C1 C4 H10 109.317
C1 C4 H11 112.895 C1 C5 C2 103.561
C1 C5 H14 109.513 C1 C5 H15 113.478
C2 C3 C4 105.998 C2 C3 H8 111.636
C2 C3 H9 110.698 C2 C5 H14 110.179
C2 C5 H15 112.965 C3 C2 C5 105.448
C3 C2 H6 110.016 C3 C2 H7 112.675
C3 C4 H10 109.992 C3 C4 H11 112.751
C4 C1 C5 103.235 C4 C1 H12 113.064
C4 C1 H13 110.171 C4 C3 H8 111.017
C4 C3 H9 111.196 C5 C1 H12 113.454
C5 C1 H13 109.702 C5 C2 H6 109.537
C5 C2 H7 112.538 H6 C2 H7 106.640
H8 C3 H9 106.379 H10 C4 H11 106.753
H12 C1 H13 107.199 H14 C5 H15 107.129
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.228      
2 C -0.231      
3 C -0.233      
4 C -0.230      
5 C -0.228      
6 H 0.117      
7 H 0.114      
8 H 0.117      
9 H 0.117      
10 H 0.116      
11 H 0.114      
12 H 0.113      
13 H 0.114      
14 H 0.114      
15 H 0.113      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.006 0.002 0.001 0.007
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.615 0.001 0.000
y 0.001 -33.612 -0.007
z 0.000 -0.007 -32.559
Traceless
 xyz
x -0.529 0.001 0.000
y 0.001 -0.525 -0.007
z 0.000 -0.007 1.054
Polar
3z2-r22.109
x2-y2-0.003
xy0.001
xz0.000
yz-0.007


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.914 0.003 0.000
y 0.003 7.921 0.004
z 0.000 0.004 7.165


<r2> (average value of r2) Å2
<r2> 117.735
(<r2>)1/2 10.851